Base for a child safety seat



FIG. 1 is a perspective view of a base for a child safety seat in accordance with my new design;

FIG. 2 is a front view of thereof;

FIG. 3 is a rear view of thereof;

FIG. 4 is a left side view of thereof;

FIG. 5 is a right side view of thereof;

FIG. 6 is a top view of thereof; and,

FIG. 7 is a bottom view of thereof. 

CLAIM The ornamental design for a base for a child safety seat, as shown and described. 